Lucas Obeid defeated Juan Ignacio Zamora 6-4 7-6 in the M25 Rosario 2 q64 on clay. The upset overturned the form book — Juan Ignacio Zamora came in leading the head-to-head 1–0. Lucas Obeid claimed a first win over Juan Ignacio Zamora in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-11-21 | M15 Cordoba 2 | Q64 | clay | Juan Ignacio Zamora | 6-2 7-5 |